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DiKsa [7]
3 years ago
9

Diego can type 140 in 4 minutes

Mathematics
2 answers:
scoray [572]3 years ago
8 0

Answer:

1. He will take 11 minutes to type 385

2. He can type 525 words in 15 minutes

Step-by-step explanation:

1. Since he can type 140 words in 4 minutes, he can type 35 words in one minute. So 385 words, if typed at 35 words per minute, would be typed in 11 minutes since 385/35=11.

2. 15 minutes times 35 words per minute is equal to 525 words.

oksano4ka [1.4K]3 years ago
5 0

Answer:

11 min and 525 words

Step-by-step explanation:

I put 140 words/ 4 mins and simplified it to 35 words /1 min

Doing so i plug in what was given and used cross multiply and divid :D

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valentina_108 [34]

Answer:

i think thats 4

3 0
3 years ago
Read 2 more answers
What does x and y equal
GaryK [48]

Answer:

x=5, y=-3

Step-by-step explanation:

we can find the answer by plugging in x=3y+14 to the second equation

5(3y+14)-2y=31

simplify

15y+70-2y=31

13y=-39

y=-3

now, plug in this to the initial equation x=3y+14

x=3(-3)+14

x=-9+14

x=5

6 0
2 years ago
Read 2 more answers
Find the equation of the ellipse with the following properties:
steposvetlana [31]

Answer: The equation of an ellipse:

(

x

−

h

)

2

a

2

+

(

y

−

k

)

2

b

2

=

1

;

a

>

b

Has vertices at

(

h

±

a

,

k

)

Has foci at

(

h

±

√

a

2

−

b

2

,

k

)

Use the vertices to write 3 equations:

k

=

4

[1]

h

−

a

=

−

6

[2]

h

+

a

=

10

[3]

Use equations [2] and [3] to solve for h and a:

2

h

=

4

h

=

2

a

=

8

Use the focus to write another equation:

8

=

h

+

√

a

2

−

b

2

Substitute values for h and a:

8

=

2

+

√

8

2

−

b

2

6

=

√

64

−

b

2

36

=

64

−

b

2

b

2

=

64

−

36

b

2

=

28

b

=

√

28

Substitute the values into the standard form:

(

x

−

2

)

2

8

2

+

(

y

−

4

)

2

(

√

28

)

2

=

1

5 0
3 years ago
If f(×)=2×^2+3, then which of the following represent f(-1)?
eimsori [14]

To find the inverse of this function, we first need to replace f(x) with y.

y = 2x^2 + 3

Now, we swap x and y

x = 2y^2 + 3

Now, we solve for y.

-3

x - 3 = 2y^2

Sqrt both sides.

√(x - 3) = 2y

Divide by 2

√(x - 3)/2 = y

Replace y with f^-1(x)

√(x - 3)/2 = f^-1(x)


Just realized you were asking for f(-1), not f^-1(x)

Feels bad.

f(-1) = 2(-1^2 + 3)

f(-1) = 2(-1^5)

f(-1) = 2(-1)

<u>f(-1) = -2</u>

I'm leaving the original answer in case you also need the inverse function. :)

3 0
3 years ago
Simplify: -3(y+2)^2-5+6y<br>​
krek1111 [17]

Answer:3y^2+18y+7

:) happy to help

4 0
3 years ago
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